Wintershall Holding Gmbh

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy of Sciences

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy

Wintershall Dea Gmbh

Ivan Kuvshinov

Vladimir Stehle

Konrad Siemer

Vladimir A Kuvshinov

Liubov Altunina

Siemer Konrad

Altunina Liubov

Vladimir Kuvshinov

A process for producing mineral oil from mineral oil deposits, in which the mineral oil yield is increased by blocking highly permeable regions of the mineral oil formation by separate injection of at least one acidic formulation which comprises water-soluble Al(III) salts, and one urea- or urea derivative-comprising formulation into the deposit, said formulations not mixing with one another until within the deposit, and the mixture forming highly viscous gels under the influence of the deposit temperature. The process can be used especially in the final stage of deposit development, when watering out in production increases, and particularly after the steam flooding of the deposits.

Process for producing mineral oil from underground mineral oil deposits

Mineral oil is produced from underground mineral oil deposits by injecting one or more flooding media into an injection well and withdrawing mineral oil from a production well. Highly permeable zones are blocked in the region between the injection well and the production well by separately injecting, in succession, two different aqueous formulations, one having water and urotropin and the other having water and urea, through the injection well into the deposit. The two different aqueous formulations mix in the formation after injection to form viscous gels. Either or both formulations have at least one further metal or semimetal compound that can form gels when admixed with bases. The injection well temperature is not more than 60&#xb0; C.

Method of reducing zone permeability by in-situ formation gel of urotropin and urea in an aqueous solution

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Tomsk, Russia

Ivan Kuvshinov